What is the Mediterranean Diet
The Mediterranean diet is a dietary pattern characterized by high intake of vegetables, fruits, whole grains, legumes, nuts, fatty fish, and olive oil, with moderate consumption of low-fat dairy and wine, while limiting red meat, processed foods, and added sugars 1.
Core Components
The Mediterranean diet is not a single standardized eating plan but rather reflects traditional eating habits of populations bordering the Mediterranean Sea 1. The pattern includes:
- Plant-based foundation: Generous amounts of vegetables, fruits, whole grains, and legumes
- Healthy fats: Emphasis on monounsaturated fatty acids from olive oil (particularly extra virgin olive oil), canola oil, nuts (walnuts, almonds, hazelnuts), and soft margarine spreads 1
- Protein sources: Fatty fish, seafood, poultry, and lean meats, with reduced red and processed meat consumption 1
- Dairy: Skim or low-fat dairy products in moderate amounts 1
- Alcohol: Modest wine consumption, though without specific recommended amounts 1
Macronutrient Profile
The typical Mediterranean dietary pattern contains 32% to ≥35% of total energy from fat, with 9% to 10% from saturated fats and relatively high amounts of monounsaturated and polyunsaturated fatty acids, emphasizing omega-3 fatty acids 1. Dietary fiber intake ranges from 27 to 37 grams daily—double the current US intake 1.
Health Benefits
Greater adherence to the Mediterranean dietary pattern has been associated with 29% to 69% reduction in coronary heart disease risk and 13% to 53% reduction in stroke risk 1. The diet demonstrates beneficial effects on multiple cardiovascular risk factors, lipid profiles, insulin sensitivity, inflammatory markers, oxidative stress, endothelial function, and antithrombotic activity 2.
Key Distinction from Other Patterns
Compared to the DASH diet, the Mediterranean pattern is lower in dairy products and red/processed meats, higher in olive oil and seafood, and includes moderate wine consumption 1. Unlike the precisely defined DASH pattern, Mediterranean diet variability by geographic location creates challenges in standardization and precise risk factor associations 1.
Active Mechanisms
The beneficial effects are attributed to bioactive compounds including polyphenols, monounsaturated and polyunsaturated fatty acids, and dietary fiber 2. These components work through anti-inflammatory and anti-oxidant pathways, with particular effectiveness in controlling waist circumference and obesity 3.